1. Descripcion de la comunidad de patos del Parque Nacional de Doñana;Amat;Doñana Acta Vert.,1981
2. The nesting biology of ducks in the Marismas of the Guadalquivir, south-western Spain;Aiviat;Wildfowl,1982
3. Nest parasitism in Goldeneyes Bucephala clangula: some evolutionary aspects;Andersson;Am. Nat.,1982
4. über Mischgelege bei Enten;Bezzel;Vogelwelt,1961
5. Redhead egg parasitism of Canvasback nests;Bouffard;J. Wildl. Manage.,1983